Telephone



(No Model.)

- T. J. PERRIN.

TELEPHONE?" Patented Apr. 28.1885.

NITED STATES PATENT OFFICE.

THOMAS J. PERRIN, OF BROOKLYN, NEW YORK, ASSIGNOR, BY MESNE AS- SIGNMENTS, TO THE NATIONAL IMPROYED TELEPHONE COMPANY, OF

-NEYV ORLEANS, LOUISIANA.

TELEPHONE.

S?ECIFICATION forming part of Letters Patent No. '316,816, dated April 28. 1885.

Application filed July 25, 1884. (No model.)

To all whom it may concern:

Be it known that I, THOMAS J. PERRIN, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Telephone-Receivers,

of which the following is a specification.

My invention relates to that class of instruments in which the receiver electro-magnet is mounted on one leg of a U-shaped magnet or 1o metallic support, the opposite end of which carries the ear-piece and serves as or carries the armaturefor the receiver-magnet.

, The object of the invention is to improve the construction of this class of instruments,

so that the transmitted speech will be reproduced with greater distinctness.

In constructing my instrument I prefer to employ a permanent magnet as the support.

In the accompanying drawings, Figure 1 is 2o a perspective view of my improved instrument; Fig. 2, a side view, partly in section, of the permanent magnet, showing the receivermagnet and ear-piece mounted thereon, and Fig. 3 is a detail front view of the permanent magnet.

The permanent magnetA is preferably made of a comparatively broad strip of steel of about the proportions illustratedin the drawings. A wide longitudinal slot, a, is cut in the magnet from one end to a point preferably `beyond its center', as clearly illustrated in the drawings. This may be done either before or afterlthe :bendingof the magnet into its U The coils D E, which are connected in the telephone-circuit, are mounted upon cores which are bolted to the solid end A of the permanent magnet A, the poles of the magnets or ends o f the cores being opposite the 4o vibrating sections or legs B C of the magnet.

The vibrating ends B C of the magnet are connected by a soft-iron cross-piece, F, which constitutes an armature for the electro-magnets D E and carries the ear-piece G, which is boltedQto it between the vibrating legs B C by means of ascrew-bolt, F', as clearly shown in FigZ of thedrawings. The armaturepiece F is preferably thin enough to permit the two legs B C of the permanent magnet to vibrate toacertain extent independently of I each other. As will be perceived, the organization is such that the magnets D E act upon the vibrating legs B C, and these each transfers its motion or imparts corresponding vibration to the ear-piece G. This method of operation constitutes one of the principal features of my invention-that is, a magnet having a polel divided into sections and so arranged with the proper coils that the vibration of each section is conveyed to one ear- 6r piece. This ear-piece may consist of a concave disk of wood or other material, as is customary in this class of telephones.

The telephone above described is more" especially designed for use in connection with my improved system of telephony set forth in application No. 138,7 74, filed July 24, 1884, and when used in that system the magnets D E will be made of different resistances, for the purpose set forth in that application. The 7o telephone, however, is not limited to such a construction or such a use.

I claim as my invention- 1. The combination of the magnet or support A, an electro-magnet mounted on one end 7 5 thereof, the opposite independently-vibrating ends or legs of said magnet or support, a connection between said legs, and an ear-piece.. mounted on said connection.

2. The combination, substantially as set 8o forth, of the permanent magnet or support A, electro-magnets D E, mounted on the solid end thereof, independently-vibrating legs or sections of said magnet arranged opposite the poles of the electro-magnet, an armature-piece connecting said vibrating legs, and an earpiece mounted ou said armature.

3. The combination of the slotted permanent magnet A, bent in the middle into U shape, substantially as shown, the electro- 9o magnets carried by the solid end of said permanent magnet, the vibrating legs or sections `of said permanent magnet, and an ear-piece common to both of said legs. i

In testimony whereof I have hereunto subscribed my name.

THOMAS J. PERRIN.

Witnesses: 5

L. C. YOUNG, NELLIE L. HoLMns. 

